Wow...looks like you need some more practice, I've got about 21 in the freezer you can practice on....

Seriously, how do you get it so clean especially around the face like that

The bigger question would be "Why do you flesh the head so good?" It's not necessary...... Beaver, like coon, should be fleshed from the back of the ears on down. It is a good idea to knock the chunks off around the ears so you don't get a tainted, stinky area on the pelt, but that's about it. I'd also recommend using an electric stapler to put them on the board, unless you only plan to finish three or four a day...